A-horizon

Noun

(soil science) The topmost layer of the soil horizons; topsoil

Japanese Meaning

（土壌学）土壌の最上層、すなわちA層または表土。

The farmer carefully examined the A-horizon to assess the soil's fertility before planting.

農家は植え付け前に土壌の肥沃度を評価するために表土を注意深く調べた。

Sense（1）

(soil science) The topmost layer of the soil horizons; topsoil

A-horizons

（ plural ）